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Turtles make sense after all

Evolutionary development study describes a critical fold that sends the reptile off on its own

4:08pm, July 9, 2009

Turtles may be weird, but according to new research, they’re not that weird. Their funny arrangement of shell and shoulder is just the same old land-dweller vertebrate stuff — with a little fold.

At first a turtle embryo grows much like a chicken or mouse. But then the developing body wall makes a critical fold, and the usual body plan starts to become an unusual turtle, Hiroshi Nagashima of Kobe Univers

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